Improvement in miners  bars



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UNITED STATES PATENT OFFICE.

RALPH B. PLATT, `OF HAZLETON', PENNSYLVANIA.

IMPROVEMENT IN MINERS BARS.V

Specification forming part of Letters Patent No. 138,098, dated April22, 1873; application led January 1l, 1873.

To all whom it may concern:

Be it known that I, RALPH B. PLATT, of Hazleton, in the county ofLuzerne and State of Pennsylvania, have invented a new and ImprovedMinersBar, of which the following is a specification:

My invention consists of a bar for coal-miners, to which a set of toolsor points may be detachably connected, so that I make one bar sufficefor all by changing the points as required for the dili'erent kinds ofwork, and thus save the carrying of a considerable amount of weight inchanging from place to place; also a considerable expense. My inventionalso consists of a copper tamper, for tamping the charge for a blast,constructed as hereinafter described.

Figure l is a side elevation of my improved bar with the copper'camping-tool attached, a

. part being sectioned to show the screw point connecting them, and atthe top of the bar where the tamper is commonly arranged, I have acrow-bar or a pick-bar point for the purposes of the ordinary crow-bar.Fig. 2 is an end view of Fig. 1. Fig. 3 is a side elevation of thecopper drill-point. Fig. 4 is an end elevation of Fig. 3. Fig. 5 is aside elevation of the pick-pointed attachment. Fig. 6 isV an end of Fig.5. Fig. 7 is a side elevation of the steel drill-point; and Fig. Sis anend view of Fig. 7.

A is the bar, which I provide with a screwthreaded socket in the end forthe connection of the different tools, which I provide with acorresponding screw-threaded projection, B, above a shoulder, C, the barbeing about as much shorter than the ordinary bar as the length of thetools, which are merely as long as needed `for wear. D is acrow-bar-shaped construction of the top of the bar, which I put on thetop of the bar instead of the tamper, which I propose to make of copper,so as not to strike ire while tamping the charge, and thus prevent thepremature discharges, which sometimes occur. E represents `the coppertamper, which is attached to the bar A at the socket end by the shank F,which I make partly of steel, and connect the short copper shank of thetamper to it at G, so that less copper will be wasted when the tamperhead is worn out. H is the copper reamng-drill, for reaming out theholes in which the charges have failed to explode; itis, like thetamper, connected to a 'short steel shank, I, which connects with thebar. K is the diamond or pickpointed tool, ot' steel 5 it is intendedmore particularly for use in prying down the larger pieces cracked oft',but not thrown down by the explosion. L is the steel-pointed drill-bit,for ordinary use.

Besides these, I may have other points or tools, as I may wish.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. A minerls bar with a crow or pick bar form at thetop, and to which miners tools or points of the different forms used aredetachably connected, substantially as specilied.

2. A copper tamping-tool, E, provided with a steel shank, as shown anddescribed.

RALPH B. PLATT.

Witnesses: y

J. C. FnacnEE,l R. F. RUSSELL.

